Funding for this research was provided by:
Fonds National de la Recherche Luxembourg (FNR/PoC16/11559169, Aides à la Formation-Recherche)
Text and Data Mining valid from 2019-12-01
Received: 22 September 2019
Accepted: 13 December 2019
First Online: 30 December 2019
: The authors declare that they have no competing interests.